Building a new Tor that can resist next-generation state surveillance by J.M. Porup.
A great survey of both the current status of Tor as well as projects that wish they could replace it.
Highly recommended except for the “Tor is not perfect” and some unknown solution will be stronger tone.
Perhaps, perhaps not, the key insight should be no security solution is perfect. Not now, not ever.
The Snowden leak, which is mentioned in the post, is evidence that even practically unlimited budgets are no guarantee of security.